Line-wire insulator.



L. FORT.

LINE WIRE INSULATOR.

APPLICATION man APR. I3, 1915.

1,292,451. Patented Jan. 28, 1919.

. 2 SHEETS-SHEE-l 2- Fg. :1.0.l Fig- 11- 3 @WW1/toc @gw MGH Lou'z's Fort,

may be securely clamped with a maximum of insulation between the conductor and ground Furthermore, 'the device is so arranged that in the event of the insulator being fractured, the wire will not drop from the pin butwil1 be held by certain of the clamping members against dislodgment. With the ordinary petticoat insulator, it is a usual occurence when the insulator is broken for the wire to drop down.

Referringv to the drawings, there is an insulator of petticoat type having abodypart 1 provided with the usual irregular grooved surface and having extending from one side (as illustrated in Figs 1 to 5) or arranged to be clamped on one side (as illustrated in Figs. 8 and 9), a boss 2,

l There is, of course, a central opening for the pin as at 3 and the petticoat formation 4 at the bottom of the insulator. The boss 2, as illustrated in Fig. 1, has an angularly formed opening` 5 which asshown, is of square cross-section and tapered. Fitting this opening is a similarly formed lug 6 extending from the rear face of a clamping member 7. This clamping member 7 and yau' gether.

its coperating member 8 are formed of insulating material and each is provided with y gripping recesses 9, 10 of a proper form to engage a wire. The form illustrated is .particularly adaptable for the ltwin-wire type of conductor, and may of course be serrated.

The clamp member 7 has extending from it an angularlyformed rib 11 anda simi` larly formed recess 12. The latter registers with a boss 13 and the former witha groove 14 formed in theinsulating member 8.

i When the clamping parts are arranged to hold horizontally disposed wires, a. pair of clamping hooks 15v having loops 16 and extended ends 17 are passed about the grooves 18, 19 atthe upper and lower portions of the `insulator and 4are then passed through perforations 20, 2l in the' respective clamp members 7 and.8. O n the rear face of the clamp member 8 are arranged washers or plates 22 which preferably have angularly" formed openings 221 to prevent their turning on th'eshanks 17 of Athe hooks. clamping devices 23 bind the parts' to- The purppse of usinI extended plates 22 which, ,it will be obs/fer ed, do not come in contact with each other, but are separated by an insulating boss 24, is to prevent a continuous metallic circuit about the conducting wire and the insulator. yThis breaks what otherwise will be a secondary circuit. The plates' also have a further function in that they, with the hooks 15 serve as a retainer for holding the conductor' Nuts or other suitable' When the clamp is used for supporting a vertical wire, the clamp parts 7, 8 are. transposed relatively to the petticoat body- In lieu lof forming the boss 2 directly upon the petticoat insulator, the device may be formed as illustrated in Figs. 8 and 9, where the same forms of clamping hooks or U-shaped clamping members are employed but where the petticoat insulator 26*l is of the ordinary well known type without a boss formed onone side and integral therewith. In this case, the clamping member 27 has an extended seat portion 28 which wconforms to the surface of the insulator and may be rmly seated there-against when its -coperating clamp member 29 is drawn into position by the clamping hooks.

In Fig. 9, the same arrangement is illustrated with the base-part 28 of the clamping member 27 conforming to the surface of the petticoat insulator 26@L and with the clamping parts disposed for receiving a conductor extending vertically.

In Figs. 10 to 13, there is shown a slightly modied type of petticoat insulator which lacks the upper and lower grooves of Fig. \1. In this form, the upper and lower grooves are made unnecessary by providing a full dome 30 and extending this to one side as at 31, where one side 32 of the clamp member is formed and coperates with an insulating clamping member 33, formed in j lines ofcontinuation of the extended por'- tion 31 of the insulator body. To pref vent `lateral and other movementsof the two clamping parts, an angularly-shaped rib 34 and an angularly shaped. groove 35 formed below the upper surface of the clamp member 33 register with similarly formed grooves and ribs 36, 37 also formed below the upper surface of the insulator 30..

Thus, there is a clean water-shed and highly resistantl surface of maximum area interposed between the conductor and the pin or ground and the same advantageous clamping features are maintained.

'In Figs. 14 and 15, the same idea of utilv izing a clamp form such as shown in Figs. 10 and 11 with the ordinary type of'petticoat insulator yis illustrated. In these figures, the base-part 38of the clamp conformsv It will be observed that inany of the` forms the clamping members having their respective parts formed of insulating material increase the insulation between the conductor and the ground and that in any of the various arrangements, the clamping parts will prevent drop of the Wire in the event of the insulating parts being broken. Of course, it will be understood that the form of the clamp opening may be of any desired style or type to meet the exigencies of any particular case, although the forni illustrated will be effective for holding either twin Wires or round Wires.

Obviously, the exact form and detail of the respective parts is quite immaterial so clamp member on opposite sides of the wire groove for binding said insulating clamp members to a wire.

2. A line wire insulator having a bodypartof the petticoat insulator type, a boss extending from one side thereof, an insulating clamp member fitting said boss and adjustable for receiving a vertically or horizontally disposed wire, a coperating clamp member for clamping a wire against the adjustable clamp in either of its positions of adjustment on the petticoat insulator, and clamprdevices for binding the insulating clamp members to the boss.

3. A line wire insulator consisting of an insulating body-part of petticoat type, a boss extending from one side thereof, an `insulating clamp piece, said boss and clamp- 1ng piece having interengaging recesses and projections for adjustably arranging said clamp piece upon the boss of the Petticoat insulator, an insulating clamping member for clampinga Wire to the adjustable clamp member and clampin the parts clamped agalnst a Wire.

4. A line wire insulator consisting of an insulating body of petticoat type, a sectional insulating clamp having clamping members for a wire and having between them a wire opening at one side of said petticoat, insulator, and a metallic clamping device encircling the petticoat insulator and extending through the clamping members on opposite sides of the wire opening.

5. A line wire insulator consisting of an insulating body of Petticoat type, a sectional insulating clamp having clamping members for a wire and having a wire open# ing at one side of said petticoat insulator, a metallic clamping device encircling the petticoat insulator and extending through means for holding the clamping members on opposite sides of the wire opening and non-rotatable washer plates for the clamp device.

6. In a line wire insulator, an insulating body-part of petticoat type, a separable adjustable insulating clamp at one side thereof, a clamping device encircling the petticoat body-part and consisting of two clamping members projectingl through the separable clamp, Washerv plates engaging each. of the clamping members and means for preventing relative rotation of the clamping members and washer plates, andA an insulating boss extending between the adjacent ends of the washer plates.

7. A line wire insulator, consisting of an insulating body-part of petticoa-t type, a boss projecting from one side thereof and forming one section of a clamp, a coperating insulating clamp member, interengaging ribs and grooves formed in the body of the clamp parts below the upper surface thereof and a clamp device engaging the petticoat insulator and clamp parts for clampingv a wire to the petticoat insulator.

Louis FORT.

Witnesses:

Bnssm ABRAMsoN, KATE BRENNER. 

